Electronics and electric vehicles (EVs) are driving increased battery demand. To meet this demand, the production of batteries is growing apace, requiring increased input of the critical minerals necessary for their function. While much has been written about the scarcity of mines to produce the critical minerals, the supply crunch of reagents for the added processing involved to extract and refine these critical minerals is a potential hurdle that currently lies just below the surface. Reagent supply for critical minerals is on track to emerge both as a slate of challenges and as a window to new opportunities.